package com.atguigu.web;

import com.atguigu.pojo.Book;
import com.atguigu.pojo.Page;
import com.atguigu.service.BookService;
import com.atguigu.service.impl.BookServiceImpl;
import com.atguigu.utils.WebUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author YAO
 * @create 2021-05-06 15:49
 */
@WebServlet(name = "ClientBookServlet", value = "/client/bookServlet")
public class ClientBookServlet extends BaseServlet{

    private BookService bookService = new BookServiceImpl();

    /**
     * 处理分页功能
     * @param req
     * @param resp
     * @throws ServletException
     * @throws IOException
     */
    protected void page(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // 1.获取请求的参数 pageNo pageSize
        int pageNo = WebUtils.parseInt(req.getParameter("pageNo"),1);
        int pageSize = WebUtils.parseInt(req.getParameter("pageSize"), Page.PAGE_SIZE);
        // 2.调用bookService.page() 返回page对象
        Page<Book> page = bookService.page(pageNo, pageSize);

        page.setUrl("client/bookServlet?action=page");

        // 3.保存page对象到request域中
        req.setAttribute("page",page);
        // 4.请求转发到page/manager/book_manager.jsp
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);

    }

    /**
     * 处理分页功能
     * @param req
     * @param resp
     * @throws ServletException
     * @throws IOException
     */
    protected void pageByPrice(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // 1.获取请求的参数 pageNo pageSize
        int pageNo = WebUtils.parseInt(req.getParameter("pageNo"),1);
        int pageSize = WebUtils.parseInt(req.getParameter("pageSize"), Page.PAGE_SIZE);
        int min = WebUtils.parseInt(req.getParameter("min"),0);
        int max = WebUtils.parseInt(req.getParameter("max"),Integer.MAX_VALUE);

        // 2.调用bookService.page() 返回page对象
        Page<Book> page = bookService.pageByPrice(pageNo, pageSize, min, max);

        StringBuffer sb = new StringBuffer("client/bookServlet?action=pageByPrice");
        //如果有最小价格的参数，追加到分页条的地址参数中
        if(req.getParameter("min") != null){
            sb.append("&min=").append(req.getParameter("min"));
        }
        //如果有最大价格的参数，追加到分页条的地址参数中
        if(req.getParameter("max") != null){
            sb.append("&max=").append(req.getParameter("max"));
        }

        page.setUrl(sb.toString());

        // 3.保存page对象到request域中
        req.setAttribute("page",page);
        // 4.请求转发到page/manager/book_manager.jsp
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);

    }
}
